In kickboxing and sparring, a lot of time people focus on getting the perfect jab, a great uppercut, or a strong kick.  While those things are important, its also essential to not forget to focus on movement.  Being nimble and moving around can be a great asset especially if you are sparring against someone with a larger reach because speed and movement can help you get inside their reach.  When training, spend time focusing on your movement.  Just like how everyone has to focus on pivoting their feet or turning over their punches when they are starting, as you progress you want to focus on how you are moving around your opponent.  For example, don’t always move diagonally left.  Instead try moving to the right some.  Mix it up a little and see what works for you.